EP0015865A1 - Gas blast circuit breaker - Google Patents

Gas blast circuit breaker Download PDF

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Publication number
EP0015865A1
EP0015865A1 EP80730011A EP80730011A EP0015865A1 EP 0015865 A1 EP0015865 A1 EP 0015865A1 EP 80730011 A EP80730011 A EP 80730011A EP 80730011 A EP80730011 A EP 80730011A EP 0015865 A1 EP0015865 A1 EP 0015865A1
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EP
European Patent Office
Prior art keywords
contact
switching unit
sliding contact
ring
contact ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP80730011A
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German (de)
French (fr)
Other versions
EP0015865B1 (en
Inventor
Rüdiger Dr. rer. nat. Hess
Heiner Marin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
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Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG filed Critical Siemens AG
Priority to AT80730011T priority Critical patent/ATE600T1/en
Publication of EP0015865A1 publication Critical patent/EP0015865A1/en
Application granted granted Critical
Publication of EP0015865B1 publication Critical patent/EP0015865B1/en
Expired legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/70—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid
    • H01H33/88—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts
    • H01H33/90—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism
    • H01H33/91—Switches with separate means for directing, obtaining, or increasing flow of arc-extinguishing fluid the flow of arc-extinguishing fluid being produced or increased by movement of pistons or other pressure-producing parts this movement being effected by or in conjunction with the contact-operating mechanism the arc-extinguishing fluid being air or gas

Definitions

  • the invention relates to an electric pressure gas switch with a blowing device consisting of a piston and cylinder, with two fixed nozzle-shaped switching elements and a tubular bridging switching element connecting them in the switched-on position, which consists of contact lamellae resiliently mounted inside a tubular sleeve and an end face with the interposition of electrical insulation composed sliding contact ring made of arc-resistant material.
  • the sliding contact ring is galvanically isolated from the contact blades in the switched-on position.
  • the contact lamellae are galvanically connected to the sliding contact ring immediately before the contact lamellae are separated from the fixed contact piece which is still conductively connected to the sliding contact ring.
  • the contact blades come with one jumping edge of the sliding contact ring engages, which forms a stop for the radially inward movement of the contact blades.
  • the invention has for its object to provide a gas pressure switch of the type mentioned, with which the breaking capacity and the service life of the contact blades is increased, in particular short-circuit currents should be able to be switched safely under the conditions of the short-circuit distance of more than 60 kiloamps. According to the invention, this is achieved in that at least one of the contact lamellae is permanently connected to the sliding contact ring in an electrically conductive manner.
  • the current is commutated from the contact lamellae to the sliding contact ring without delay, so that the release of larger amounts of metal vapor from the contact lamellae under the influence of arcs is avoided.
  • the sliding contact ring is not directly connected to the tubular sleeve, so that only a single main current path is formed through all contact lamellae. This ensures the advantage that a weakening of the contact force cannot occur due to parallel current paths.
  • a contact lamella is pressed resiliently against the sliding contact ring.
  • the contact lamella itself can be associated with play with respect to the one fixed switching contact piece and thus continuously load the sliding contact ring.
  • connection of the contact lamella to the sliding contact ring is provided via a flexible current band.
  • a d r character in a half-section of an electric pressure gas switch is shown schematically with the necessary parts for understanding the invention.
  • the pressure gas switch shown in the figure is a high-voltage switch for, for example, 110 to 170 kV, in which sulfur hexafluoride is used as an extinguishing and insulating agent.
  • the switch has a z. B. made of porcelain switching chamber 1, in the interior of two fixed switching pieces 2, 3 are arranged.
  • the switching pieces 2, 3 carry nozzle bodies 4, 5 on the end face, which consist of a material resistant to erosion.
  • the heath fixed contact pieces 2, 3 are in the Birschaltposition of a tubular bridging bridged contact piece 6, which consists of a tubular sleeve 6a, in the interior of which spring-mounted contact blades 7 are arranged evenly distributed over the circumference.
  • the tubular sleeve 6a has a sliding contact ring 8 on the end face, which is made of arc-resistant material, for. B. graphite, and is interposed with an electrical insulation 9.
  • the sliding contact ring 8 has a projection 8a directed towards the contact plates 7, on which the contact plates 7 can be supported.
  • One of the contact plates 7a is, as the figure shows, constantly connected to the sliding contact ring 8, namely in that the contact plate 7a is constantly resiliently pressed against the sliding contact ring 8.
  • the contact lamella on both sides with a contact lug 7b so that it participates in the current transmission like the other contact lamellae 7.
  • the connection of the contact lamella 7a with the sliding contact ring is carried out via a flexible current band.
  • the blowing cylinder 11 of a blowing device is simultaneously moved in the same direction, so that the blowing volume 12 enclosed by the blowing cylinder 11 is compressed against a relatively fixed piston 13 of the blowing device.

Abstract

An electric gas blast circuit breaker is disclosed which has two stationary contact pieces. A switching unit is movable between closed and open positions for electrically bridging the contact pieces in the closed position and for electrically disconnecting the contact pieces in the open position whereby an arc develops when the switching unit is moved to the open position. A gas blast device blasts a stream of gas through the arc when the switching unit is moved to the open position. The switching unit includes a supporting body and a slide-contact ring made of an arc-resistant material. The ring slideably contacts one of the contact pieces in the closed position and is mounted on the supporting body so as to be electrically insulated therefrom. A plurality of elongated contact elements are disposed in the supporting body for electrically connecting the contact pieces when the switching unit is in the closed position. There is provided an electrical connection between at least one of the contact elements and the slide-contact ring when the switching unit is in the closed position and also when it moves into the open position and continuously in all operating positions thereof.

Description

Die Erfindung bezieht sich auf einen elektrischen Druckgasschalter mit einer aus Kolben und Zylinder bestehenden Blaseinrichtung, mit zwei feststehenden düsenförmigen Schaltstücken und einem diese in der Einschaltstellung verbindenden rohrförmigen Überbrückungsschaltstück, das aus im Innern einer rohrförmigen Hülse federnd gelagerten Kontaktlamellen und einem stirnseitig unter Zwischenlage einer elektrischen Isolierung gefaßten Gleitkontaktring aus lichtbogenbeständigem Material besteht.The invention relates to an electric pressure gas switch with a blowing device consisting of a piston and cylinder, with two fixed nozzle-shaped switching elements and a tubular bridging switching element connecting them in the switched-on position, which consists of contact lamellae resiliently mounted inside a tubular sleeve and an end face with the interposition of electrical insulation composed sliding contact ring made of arc-resistant material.

Bei einer derartigen, aus der DE-PS 22 09 287 bekannten Ausführungsform eines elektrischen Druckgasschalters ist der Gleitkontaktring in der Einschaltstellung von den Kontaktlamellen galvanisch getrennt. Im Verlaufe der Ausschaltbewegung werden die Kontaktlamellen mit dem Gleitkontaktring unmittelbar vor Trennung der Kontaktlamellen von dem noch mit dem Gleitkontaktring leitend verbundenen feststehenden Schaltstück galvanisch verbunden. Dabei gelangen die Kontaktlamellen mit einem vorspringenden Rand des Gleitkontaktringes in Eingriff, der einen Anschlag für die radial nach innen gerichtete Bewegung der Kontaktlamellen bildet.In such an embodiment of an electrical pressure gas switch known from DE-PS 22 09 287, the sliding contact ring is galvanically isolated from the contact blades in the switched-on position. In the course of the switch-off movement, the contact lamellae are galvanically connected to the sliding contact ring immediately before the contact lamellae are separated from the fixed contact piece which is still conductively connected to the sliding contact ring. The contact blades come with one jumping edge of the sliding contact ring engages, which forms a stop for the radially inward movement of the contact blades.

Im Verlauf der Ausschaltbewegung muß der Strom von den Kontaktlamellen auf den Gleitkontaktring kommutiert werden. Diese Kommutierung kann bei Schalterausführungsformen für große Nenn- und Kurzschlußströme durch die Trägheit der mit großen Querschnitten versehenen Kontaktfinger beim Ablauf vom feststehenden Schaltstück verzögert werden, so daß ein erhöhter Abbrand an den Kontaktlamellen auftreten kann. Außerdem kann der dabei auftretende Metalldampf die Schaltleistung des Schalters beeinträchtigen.In the course of the switch-off movement, the current must be commutated from the contact blades to the sliding contact ring. This commutation can be delayed in switch designs for large nominal and short-circuit currents due to the inertia of the contact fingers provided with large cross sections when the fixed contact piece expires, so that increased erosion can occur at the contact lamellae. In addition, the metal vapor that occurs can impair the switching performance of the switch.

Der Erfindung liegt die Aufgabe zugrunde, einen Druckgasschalter der eingangs genannten Art anzugeben, mit dem das Abschaltvermögen und die Lebensdauer der Kontaktlamellen gesteigert wird, insbesondere sollen Kurzschlußströme unter den Bedingungen des Abstandskurzschlusses von mehr als 60 Kiloampere sicher geschaltet werden können. Nach der Erfindung wird dies dadurch gelöst, daß zumindest eine der Kontaktlamellen ständig mit dem Gleitkontaktring elektrisch leitend verbunden ist.The invention has for its object to provide a gas pressure switch of the type mentioned, with which the breaking capacity and the service life of the contact blades is increased, in particular short-circuit currents should be able to be switched safely under the conditions of the short-circuit distance of more than 60 kiloamps. According to the invention, this is achieved in that at least one of the contact lamellae is permanently connected to the sliding contact ring in an electrically conductive manner.

Durch Anwendung der Erfindung wird der Strom von den Kontaktlamellen auf den Gleitkontaktring unverzögert kommutiert, so daß die Freisetzung größerer Metalldampfmengen aus den Kontaktlamellen unter Lichtbogeneinfluß vermieden ist. Im Kontaktsystem des Schalters nach der Erfindung ist der Gleitkontaktring mit der rohrförmigen Hülse nicht direkt leitend verbunden, so daß sich nur ein einziger Hauptstrompfad durch alle Kontaktlamellen ausbildet. Damit ist der Vorteil gesichert, daß eine Kontaktkraftschwächung aufgrund paralleler Strompfade sich nicht einstellen kann.By applying the invention, the current is commutated from the contact lamellae to the sliding contact ring without delay, so that the release of larger amounts of metal vapor from the contact lamellae under the influence of arcs is avoided. In the contact system of the switch according to the invention, the sliding contact ring is not directly connected to the tubular sleeve, so that only a single main current path is formed through all contact lamellae. This ensures the advantage that a weakening of the contact force cannot occur due to parallel current paths.

Bei einem ersten Ausführungsbeispiel ist eine Kontaktlamelle federnd gegen den Gleitkontaktring gedrückt. Dabei kann die Kontaktlamelle selbst mit Spiel gegenüber dem einen feststehenden Ablaufschaltstück zugeordnet sein und so dauernd den Gleitkontaktring belasten. Es ist aber auch möglich, dem Gleitkontaktring im Bereich einer Kontaktlamelle ein erhöhtes Auflager zu geben, das die Kontaktlamelle nicht in Eingriff mit dem Ablaufscheltstück gelangen läßt, so daß hierdurch eine ständige leitende Verbindung sichergestellt ist.In a first exemplary embodiment, a contact lamella is pressed resiliently against the sliding contact ring. The contact lamella itself can be associated with play with respect to the one fixed switching contact piece and thus continuously load the sliding contact ring. However, it is also possible to give the sliding contact ring in the area of a contact lamella an increased support which does not allow the contact lamella to come into engagement with the drainage block piece, so that this ensures a permanent conductive connection.

Bei einer weiteren Ausführungsform nach der Erfindung ist die Verbindung der Kontaktlamelle mit dem Gleitkontaktring über ein flexibles Stromband vorgesehen. Bei dieser Ausführungsform ergibt sich der Vorteil, daß alle Kontaktlamellen an der Übertragung des Kurzschlußstromes unmittelbar teilnehmen und der Gleitkontaktring dennoch ständig das gleiche Potential wie die Kontaktlamellen hat.In a further embodiment according to the invention, the connection of the contact lamella to the sliding contact ring is provided via a flexible current band. In this embodiment, there is the advantage that all contact blades participate directly in the transmission of the short-circuit current and the sliding contact ring nevertheless has the same potential as the contact blades.

Anhand der Zeichnung ist ein Ausführungsbeispiel nach der Erfindung beschrieben und die Wirkungsweise erläutert.An exemplary embodiment according to the invention is described and the mode of operation is explained with reference to the drawing.

In dAr Figur ist in einem Halbschnitt ein elektrischer Druckgasschalter mit den zum Verständnis der Erfindung erforderlichen Teilen schematisch dargestellt. Der in der Figur dargestellte Druckgasschalter ist ein Hochspanmunssschalter für beispielsweise 110 bis 170 kV, in dem Schwefelhexafluorid als Lösch- und Isoliermittel verwendet wird. Der Schalter weist eine z. B. aus Porzellan bestehende Schaltkammer 1 auf, in deren Innenraum zwei feststehende Schaltstücke 2, 3 angeordnet sind. Die Schaltstücke 2, 3 tragen stirnseitig Düsenkörper 4, 5, die aus einem abbrandbestandigen Material bestehen. Die heiden feststehenden Schaltstücke 2, 3 sind in der Birschaltstellung von einem rohrförmigen Überbrückungsschaltstück 6 überbrückt, das aus einer rohrförmigen Hülse 6a besteht, in deren Innern federn gelagerte Kontaktlamellen 7 gleichmäßig über den Umfang verteilt angeordnet sind. Die rohrförmige Hülse 6a hat stirnseitig einen Gleitkontaktring 8, der aus lichtbogenbeständigem Material, z. B. Graphit, besteht und unter Zwischenlage einer elektrischen Isolierung 9 gefaßt ist.In A d r character in a half-section of an electric pressure gas switch is shown schematically with the necessary parts for understanding the invention. The pressure gas switch shown in the figure is a high-voltage switch for, for example, 110 to 170 kV, in which sulfur hexafluoride is used as an extinguishing and insulating agent. The switch has a z. B. made of porcelain switching chamber 1, in the interior of two fixed switching pieces 2, 3 are arranged. The switching pieces 2, 3 carry nozzle bodies 4, 5 on the end face, which consist of a material resistant to erosion. The heath fixed contact pieces 2, 3 are in the Birschaltposition of a tubular bridging bridged contact piece 6, which consists of a tubular sleeve 6a, in the interior of which spring-mounted contact blades 7 are arranged evenly distributed over the circumference. The tubular sleeve 6a has a sliding contact ring 8 on the end face, which is made of arc-resistant material, for. B. graphite, and is interposed with an electrical insulation 9.

Der Gleitkontaktring 8 weist einen auf die Kontaktlamellen 7 gerichteten Vorsprung 8a auf, an dem sich die Kontaktlamellen 7 abstützen können. Eine der Kontaktlamellen 7a ist, wie die Figur erkennen läßt, ständig mit dem Gleitkontaktring 8 verbunden, und zwar dadurch, daß die Kontaktlamelle 7a ständig federnd gegen den Gleitkontaktring 8 gedrückt ist.The sliding contact ring 8 has a projection 8a directed towards the contact plates 7, on which the contact plates 7 can be supported. One of the contact plates 7a is, as the figure shows, constantly connected to the sliding contact ring 8, namely in that the contact plate 7a is constantly resiliently pressed against the sliding contact ring 8.

Anstelle der dargestellten Ausführungsform ist es auch möglich, die Kontaktlamelle beidseitig mit einer Kontaktnase 7b zu versehen, so daß sie an der Stromübertragung wie die übrigen Kontaktlamellen 7 teilnimmt. In diesem Falle wird die Verbindung der Kontaktlamelle 7a mit dem Gleitkontaktring über ein flexibles Stromband vorgenommen.Instead of the illustrated embodiment, it is also possible to provide the contact lamella on both sides with a contact lug 7b so that it participates in the current transmission like the other contact lamellae 7. In this case, the connection of the contact lamella 7a with the sliding contact ring is carried out via a flexible current band.

Wenn das Überbrückungsschaltstück 6 in Pfeilrichtung 10, d. h. in die Ausschaltlage, gezogen wird, wird gleichzeitig der Blaszylinder 11 einer Blaseinrichtung in die gleiche Richtung bewegt, so daß das vom Blaszylinder 11 umschlossene Blasvolumen 12 gegen einen relativ feststehenden Kolben 13 der Blaseinrichtung komprimiert wird.If the bypass switch 6 in the direction of arrow 10, i.e. H. is pulled into the switch-off position, the blowing cylinder 11 of a blowing device is simultaneously moved in the same direction, so that the blowing volume 12 enclosed by the blowing cylinder 11 is compressed against a relatively fixed piston 13 of the blowing device.

Die Kommutierung des Stromes von den Kontaktlamellen 7, 7a auf den Gleitkontaktring 8 erfolgt unverzögert und unabhängig vom Trägheitsverhalten der federbelasteten Kontaktlamellen während des Ablaufs vom feststehenden Schaltstück 2. Wenn auch die ringförmige Isolierung 9 von diesem Schaltstück 2 abläuft, wird das komprimierte Gas in das Innere der Düsen 4, 5 getrieben und der zuvor zwischen dem Gleitkontaktring 8 und dem Düsenkörper 4 gezogene Lichtbogen, der im weiteren Verlauf der Ausschaltbewegung vom Gleitkontaktring 8 auf den Düsenkörper 5 kommutiert, wirksam beblasen.The commutation of the current from the contact plates 7, 7a to the sliding contact ring 8 takes place without delay and regardless of the inertial behavior of the spring-loaded contact plates during the course of the fixed contact piece 2. If the annular insulation 9 also runs from this contact piece 2, this is compressed Gas is driven into the interior of the nozzles 4, 5 and effectively blow the arc previously drawn between the sliding contact ring 8 and the nozzle body 4, which commutates from the sliding contact ring 8 onto the nozzle body 5 in the course of the switch-off movement.

Claims (3)

1. Elektrischer Druckgasschalter mit einer aus Kolben und Zylinder bestehenden Blaseinrichtung, mit zwei feststehenden düsenförmigen Schaltstücken und einem diese in der Einschaltstellung verbindenden rohrförmigen Überbrückungsschaltstück, das aus im Innern einer rohrförmigen Hülse federnd gelagerten Kontaktlamellen und einem stirnseitig unter Zwischenlage einer elektrischen Isolierung gefaßten Gleitkontaktring aus lichtbogenbeständigem Material besteht, dadurch gekennzeichnet , daß zumindest eine der Kontaktlamellen (7) ständig mit dem Gleitkontaktring (8) elektrisch leitend verbunden ist.1.Electric gas switch with a blowing device consisting of a piston and cylinder, with two fixed nozzle-shaped switching elements and a tubular bridging switching element connecting them in the switch-on position, which consists of contact lamellae resiliently mounted in the interior of a tubular sleeve and a sliding contact ring made of arc-resistant made on the end face with the interposition of electrical insulation Material consists, characterized in that at least one of the contact lamellae (7) is permanently electrically connected to the sliding contact ring (8). 2. Elektrischer Druckgasschalter nach Anspruch 1, dadurch gekennzeichnet , daß die Kontaktlamelle (7) federnd gegen den Gleitkontaktring (8)-gedrückt ist.2. Electrical pressure gas switch according to claim 1, characterized in that the contact plate (7) is resiliently pressed against the sliding contact ring (8). 3. Elektrischer Druckgasschalter nach Anspruch 1, dadurch gekennzeichnet , daß die Verbindung der Kontaktlamelle (7) mit dem Gleitkontaktring (8) über ein flexibles Stromband vorgesehen ist.3. Electrical pressure gas switch according to claim 1, characterized in that the connection of the contact lamella (7) to the sliding contact ring (8) is provided via a flexible current band.
EP80730011A 1979-03-06 1980-02-15 Gas blast circuit breaker Expired EP0015865B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80730011T ATE600T1 (en) 1979-03-06 1980-02-15 ELECTRIC GAS SWITCH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2908982 1979-03-06
DE2908982A DE2908982C3 (en) 1979-03-06 1979-03-06 Electric pressure gas switch

Publications (2)

Publication Number Publication Date
EP0015865A1 true EP0015865A1 (en) 1980-09-17
EP0015865B1 EP0015865B1 (en) 1982-01-20

Family

ID=6064770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80730011A Expired EP0015865B1 (en) 1979-03-06 1980-02-15 Gas blast circuit breaker

Country Status (9)

Country Link
US (1) US4354073A (en)
EP (1) EP0015865B1 (en)
JP (1) JPS6031142Y2 (en)
AT (1) ATE600T1 (en)
BR (1) BR8001302A (en)
CA (1) CA1148593A (en)
DE (1) DE2908982C3 (en)
MX (1) MX147086A (en)
ZA (1) ZA801275B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0665565A2 (en) * 1994-02-01 1995-08-02 ABBPATENT GmbH Contact system for high power circuit breaker

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3113325A1 (en) * 1981-03-30 1982-06-24 Ernst Prof. Dr.techn.habil. 1000 Berlin Slamecka High-voltage switching chamber

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2177804A2 (en) * 1972-02-22 1973-11-09 Siemens Ag

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH506875A (en) * 1969-03-14 1971-04-30 Siemens Ag Electric switch
DE2438017C3 (en) * 1974-08-05 1981-07-02 Siemens AG, 1000 Berlin und 8000 München Gas switch

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2177804A2 (en) * 1972-02-22 1973-11-09 Siemens Ag
FR2181860A2 (en) * 1972-02-22 1973-12-07 Siemens Ag

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0665565A2 (en) * 1994-02-01 1995-08-02 ABBPATENT GmbH Contact system for high power circuit breaker
EP0665565A3 (en) * 1994-02-01 1997-09-17 Abb Patent Gmbh Contact system for high power circuit breaker.

Also Published As

Publication number Publication date
BR8001302A (en) 1980-11-04
US4354073A (en) 1982-10-12
EP0015865B1 (en) 1982-01-20
JPS55127348U (en) 1980-09-09
ZA801275B (en) 1981-03-25
MX147086A (en) 1982-09-30
ATE600T1 (en) 1982-02-15
DE2908982B2 (en) 1981-05-07
DE2908982C3 (en) 1982-01-28
JPS6031142Y2 (en) 1985-09-18
DE2908982A1 (en) 1980-09-18
CA1148593A (en) 1983-06-21

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